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Microchip Technology 1N5993UR/TR
- Part No.:
- 1N5993UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5993UR/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,377
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Product details
Overview
1N5993UR/TR from Microsemi is a surface-mount 5.1 V, ±5% tolerance Zener diode in DO-213AA (SOD80) MELF package, rated for 500 mW power dissipation at 25°C, with 50 mA test current, 88 Ω dynamic impedance, and 2.0 µA reverse leakage at 1.0 V. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.
For engineers reviewing the 1N5993UR/TR datasheet, 1N5993UR/TR pinout, 1N5993UR/TR application, or 1N5993UR/TR equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (300 °C/W), junction temperature range (–65 to +175 °C), RoHS compliance status, and DO-213AA mechanical compatibility with automated SMT assembly.
Technical Context
This device operates as a silicon planar Zener diode with metallurgically bonded end caps and hermetically sealed glass construction. Its regulation behavior is defined at IZT = 50 mA, where VZ = 5.1 V ±5%, ZZT = 88 Ω, and αVZ = +0.025 %/°C - indicating positive temperature coefficient above ~5 V.
The DO-213AA package enables stable thermal performance on FR4 PCBs (RθJA = 300 °C/W), supports 260 °C soldering per MIL-STD-750 Method 2026, and exhibits minimal capacitance (<2 pF typical at 0 V) due to its small junction area and MELF geometry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% at 50 mA - defines nominal regulation point with tight tolerance suitable for reference-grade biasing. |
| Power Dissipation (PD) | 0.5 W at 25 °C ambient - limits continuous DC power handling without derating; requires thermal management above 25 °C. |
| Dynamic Impedance (ZZT) | 88 Ω at 50 mA - determines output voltage stability under varying load current; lower values improve regulation fidelity. |
| Reverse Leakage (IR) | 2.0 µA max at 1.0 V - ensures minimal quiescent current draw in standby or high-impedance sensing nodes. |
| Junction Temperature Range | –65 to +175 °C - supports operation in extended industrial, aerospace, and military environments without derating. |
| Package Type | DO-213AA (SOD80/MELF) - surface-mount cylindrical glass package with end-cap terminations; compatible with standard SMT reflow profiles. |
| RoHS Compliance | e3 suffix indicates RoHS-compliant matte-tin plating (commercial grade only) - meets EU Directive 2011/65/EU requirements. |
Pinout & Package
DO-213AA (SOD80) MELF package: hermetically sealed glass cylinder with tin-lead or RoHS-compliant matte-tin plated end caps; cathode indicated by single band; polarity: banded end is cathode (positive during Zener conduction).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential node; forms reference return path during regulation. |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Connected to voltage source or feedback node; maintains stable 5.1 V relative to anode when reverse-biased above knee voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount DO-213AA packaging | Enables high-density PCB layouts and automated placement; eliminates axial-leaded lead-forming and through-hole drilling. |
| Metallurgically bonded construction | Ensures long-term reliability and thermal cycle robustness; prevents interfacial delamination under thermal stress. |
| Low capacitance (~2 pF typical) | Minimizes signal coupling and phase shift in RF-adjacent or high-speed feedback paths. |
| Radiation-hardened design | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - suitable for space-qualified and nuclear instrumentation. |
| MIL-PRF-19500 screening option | Available with MQ/MX/MV/CDS prefixes for military-grade reliability testing - supports defense and avionics BOMs. |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-derived DC-DC converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 5.1 V threshold to TL431 or optocoupler input. Use Value: Tight ±5% tolerance and low ZZT ensure <±1% output regulation accuracy across line/load/temperature. |
Use Scenario: Protecting microcontroller I/O pins or ADC inputs from transient overvoltage events up to 15 V. IC Role / Device Role / Timing Role: Passive clamping element diverting excess current to ground when input exceeds 5.1 V. Use Value: Fast response (ns-scale turn-on), low leakage (<2 µA), and robust 175 °C junction rating enable reliable field-deployed protection. |
| Reference Voltage Source | Current Source Bias |
|
Use Scenario: Generating stable bias for op-amp comparators, sensor excitation circuits, or DAC reference buffers. IC Role / Device Role / Timing Role: Low-noise, temperature-compensated voltage node delivering 5.1 V to precision analog subsystems. Use Value: +0.025 %/°C tempco and 88 Ω ZZT minimize drift and load-induced error in 12-bit+ measurement systems. |
Use Scenario: Setting constant current for LED drivers, laser diode bias, or transistor base current in linear regulators. IC Role / Device Role / Timing Role: Fixed-voltage drop element establishing ISET = VZ/RSET in series-pass configurations. Use Value: Stable 5.1 V at 50 mA enables accurate current programming with <1% error over –40 to +85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5993B-TR | Same 5.1 V ±5% spec, but in DO-35 (axial-leaded) package - no SMT compatibility. | Requires through-hole assembly; unsuitable for high-density or automated SMT lines. | Select 1N5993B-TR only if legacy board design mandates axial leads or manual assembly. |
| BZX55-C5V1-TAP | 5.1 V ±5%, 500 mW, DO-35 package; higher ZZT (100 Ω) and wider tempco (+0.05 %/°C). | Lower regulation precision and greater thermal drift than 1N5993UR/TR in temperature-critical designs. | Choose BZX55-C5V1-TAP only for cost-sensitive commercial applications where ±2% output tolerance is acceptable. |
Compared with 1N5993B-TR and BZX55-C5V1-TAP, the 1N5993UR/TR delivers superior SMT manufacturability, tighter thermal stability, and lower dynamic impedance - making it optimal for new designs requiring high-reliability surface-mount voltage references.
Availability
1N5993UR/TR is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and reference voltage source applications requiring stable component supply, consistent parametric performance, and RoHS-compliant procurement.
Supply support for 1N5993UR/TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5993UR/TR belongs to Microsemi's legacy 1N5985BUR–1N6031BUR Zener series - engineered for precision voltage regulation in harsh-environment applications demanding extended temperature operation and MIL-spec screening capability.
FAQ
What is the Zener voltage tolerance and test current for the 1N5993UR/TR?
The 1N5993UR/TR has a nominal Zener voltage of 5.1 V with ±5% tolerance, measured at a test current (IZT) of 50 mA. This tolerance is achieved via post-process binning and is specified per JEDEC standards. The 50 mA test point ensures stable regulation behavior and aligns with industry-standard characterization for 500 mW Zeners.
Is the 1N5993UR/TR RoHS compliant?
Yes, the "TR" suffix in 1N5993UR/TR indicates tape-and-reel packaging, and the "UR" designation confirms RoHS compliance (e3 plating) per EU Directive 2011/65/EU. The device uses matte-tin end-cap plating and is qualified for commercial-grade use only - military screening variants are not RoHS-compliant.
What is the maximum allowable junction temperature for the 1N5993UR/TR?
The 1N5993UR/TR has a specified junction and storage temperature range of –65 to +175 °C. This wide range supports operation in extreme environments such as downhole oil/gas sensors, avionics power systems, and industrial motor controls without derating, provided PCB thermal design maintains TJ ≤ 175 °C.
How does the 1N5993UR/TR compare to the 1N5993B-TR in terms of package and assembly?
The 1N5993UR/TR uses a DO-213AA (SOD80) MELF surface-mount package, while the 1N5993B-TR uses a DO-35 axial-leaded package. The DO-213AA enables automated pick-and-place, reflow soldering, and higher board density; the DO-35 requires through-hole insertion and wave soldering - making 1N5993UR/TR the preferred choice for modern SMT production.
What is the dynamic impedance (ZZT) of the 1N5993UR/TR and why does it matter?
The 1N5993UR/TR has a dynamic impedance of 88 Ω at IZT = 50 mA. This value quantifies how much the Zener voltage changes with small variations in current - lower ZZT means better regulation stability under dynamic load conditions, critical for precision feedback and reference applications.
1N5993UR/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5993UR/TR FAQ
1.How can I place an order for 1N5993UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5993UR/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N5993UR/TR reliable?
The price and inventory of 1N5993UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5993UR/TR is usually 5 days.
3.What payment methods are accepted for 1N5993UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5993UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5993UR/TR?
1N5993UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5993UR/TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N5993UR/TR?
For technical support, including 1N5993UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5993UR/TR requirements.
6.How does Aetrix verify that 1N5993UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N5993UR/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N5993UR/TR meets industry standards.
7.What is the process for return or replacement of 1N5993UR/TR?
All 1N5993UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5993UR/TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N5993UR/TR part is unused and in its original packaging.
Return procedure for 1N5993UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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